Abstract: A non-sewing corset with different curvature and elasticity is disclosed, having a tubular knitted main body that defines a pull-through space. A reducing portion shrinking inward is formed in the middle section of the tubular knitted main body so that the corset has an hourglass-shaped structure. Two sleeving portions are formed on the upper and lower sides of the tubular knitted main body. The reducing portion uses a knitting method different from the two sleeving portions, with its elasticity higher than the elasticity of the two sleeving portions, so that the reducing portion can have a reinforced binding on the predetermined position of the body. As a result, the corset product alone can achieve the binding and body-sculpting effect of an additional vest.